Kia K4 2025 — technical service bulletin
Bulletin TSB_ELE390 · NHTSA communication 11019907 · issued Jun 27, 2025
Technical service bulletin
communication type
Electrical System
component
2025
model years
1
vehicle entries
Official summary
TECHNICAL SERVICE BULLETIN: SERVICE ACTION: SUNROOF OPERATION LOGIC IMPROVEMENT (SA620) - This bulletin supersedes TSB SA595 (December 2024) and outlines the procedure to update the Roof Control Module (RCM) software on certain 2025MY K4 (CL4) vehicles produced between September 19, 2024, through May 28, 2025, which may experience inoperative sunroof operation (open/close) due to a software logic error. The updated software includes improved logic to address this issue.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.